Sorry guys its me again.
In my project i used UITableview for showing weather.so, I need to show the first row text to UILabel without any button action or watever. I just want cell text to UILabel without any action.
ex:
In the tableview first cell showing text as "Lovely IOS"
I want to show the same text to UILABEL without any action. I took UILabel in the xib.
Thanks in advance
Any sample code please.
you only set action for particular cell
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (indexPath.row == 1){
//set action for cell
}
}
In the method - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath equate
cell.textLabel.text = [array objectAtIndex:indexPath.row];
LabelName.text= cell.textLabel.text;
You have two options for this either you add add UILable or set the text to he cell.textLabel.text in the following method.
(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
You have the data for your cell so what's a big to UIlabel .You just need to set the same text there.
Updated:-
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
NSString *cellText = cell.textLabel.text;
you will get the text.
Related
I am using UItableViewController and I add label to the cell programatically , the label reads data from json array , on scrolling the cell reuse and the label data change ,
there is any way to prevent this issue ?
Your question is not clear.!! but according to your problem you might not set proper value(array count) for
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
and find the exact index in array using "indexPath.row"
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
if you provide your code what you've written may help us to re correct it
use following way :
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *CellId = [NSString stringWithFormat:#"CellId%d%d",indexPath.row,indexPath.section];
if (!cell)
{
cell = [[[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellId] autorelease];
}
return cell;
}
Dont use this like of code.It is used to reload the data.
cell = [[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellId];
I have set up a tableview using custom cells as such:-
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{SWHNearYouCell *cell = (SWHNearYouCell *)[tableView
dequeueReusableCellWithIdentifier:#"NearYouCell"];
SWHNearYou *aPointer = [self.thingsNearYou objectAtIndex:indexPath.row];
cell.customNearYouLabel.text = aPointer.restrauntsNearYou;
return cell;
}
I want to change the text of customNearYouLabel upon a button press but work out how to get a pointer to the cell in my -IBAction method.
Thanks
You can just handle that in your tableView:didSelectRowAtIndexPath: method by grabbing the cell.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
cell.customNearYouLabel.text = #"New Text";
}
I presume the button is not on a table cell?
If so, you just need to update the relevant value in the self.thingsNearYou array.
If you then call [tableView reloadData] then the table will reload it's data and the text of customNearYouLabel will change.
Worked it out - needed to add in self before tableview
-(IBAction)cancel:(id)sender{
SWHNearYouCell *cell = (SWHNearYouCell *)[self.tableView
dequeueReusableCellWithIdentifier:#"NearYouCell"];
cell.customNearYouLabel.text = #"New Text";
NSLog(#"This is it: %#",cell.customNearYouLabel.text);
}
I'll need to spend some more time on it as [self.tableView reloadData]; will not update the table but I reckon that should be easier to solve.
i'm using the following code to get the selected cell in the UiTableView
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
// Mofify the cell here
}
when i change the cell text or color it does not make any change in the actual UitableView
I would suggest that you reload the cell. Use:
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:NO];
You should keep track of which cell was selected, and update the cell in
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
I don't know why the text isn't updating for you when you change it in
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
but even if you get it to work, it will revert if you scroll that cell off the screen.
UITableView is a subclass of UIView and UIView has this method to force it's refresh
- (void)setNeedsDisplay
But if you don't take that change into account in
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
you may never see the change.
UITableViewCell has the -titleLabel method which returns a UILabel. Then you might use the setText: and -setColor: methods.
Try doing:
Set the backgroundColor property of the UITableViewCell.
Set the backgroundColor property of the UILabel (may not do what you need).
Set the backgroundView property if the UITableViewCell to a custom class you make by subclassing UIView, where you create a label and color.
Also, you can't just change the cell color, you need to have a data source from which cellForRowAtIndexPath: reads, which sets the cell color there. This way, the color change will persist.
I would like to make a UITableViewCell with one label and two accessory types:
Unselected cells should display a UITableViewCellAccessoryDetailDisclosureButton accessory.
The selected cell should display both the UITableViewCellAccessoryDisclosureIndicator and the UITableViewCellAccessoryDetailDisclosureButton accessories.
The only way I know how to do this is by using an image for the selected cell's accessory view. Is there an alternative way to do this?
Make a custom UITableViewCell (numerous tutorials and examples online and also in the documentation).
In your
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
selectedIndex = indexPath //selectedIndex is a property
}
Then in
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//usual cell stuff
if(indexPath == selectedIndex)
[cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator];
else
[cell setAccessoryType:UITableViewCellAccessoryDetailDisclosureButton];
}
So the trick is just to keep a reference to the selected cell and set the indicator accordingly.
Note that you might want to test if the cell is already selected before setting the selectedIndex, in that case you should set selectedIndex = nil.
I need help in using checkbox cell. I currently added the object to tableview. It looks ok until i tried building and running the program where I cannot check the checkbox. I am currently using a tableview which displays items runtime with a checkbox for each item so i can have multiple selections.
I am new to xcode and I have been stuck for a week with this problem. i tried google but still no luck.
Any snippets, answers, or explanations is very much appreciated.
First we need to edit this method: - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath. Assuming you generated a Navigation-based application, this method should already be there, only commented out. I don't know the exact details of your implementation, but you somehow have to keep track of the checkbox state for each cell in the tableView. For example, if you had a BOOL array, the following code would work:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (checkboxArray[indexPath.row])
checkboxArray[indexPath.row] = NO;
else
checkboxArray[indexPath.row] = YES;
[self.tableView reloadData];
}
Now that we know what cells need to have a checkmark next to them, the next step is to modify how the cell is displayed. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath handles the drawing of each cell. Building off the previous example, this is how you would display the checkbox:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
if (checkboxArray[indexPath.row]) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else
cell.accessoryType = UITableViewCellAccessoryNone;
// Configure the cell.
return cell;
}
If we don't call reloadData, the checkmark will not show up until it goes off-screen and reappears. You need to explicitly set the accessoryType each time because of the way cells are reused. If you set the style only when a cell is checked, other cells that may not necessarily be checked will have a checkmark when you go to scroll. Hopefully this gives you a general idea on how to use checkmarks.